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CVE-2018-1000539

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Date: June 26, 2018

Nov json-jwt version >= 0.5.0 && < 1.9.4 contains a CWE-347: Improper Verification of Cryptographic Signature vulnerability in Decryption of AES-GCM encrypted JSON Web Tokens that can result in Attacker can forge a authentication tag. This attack appear to be exploitable via network connectivity. This vulnerability appears to have been fixed in 1.9.4 and later.

Language: Ruby

Severity Score

Related Resources (8)

https://www.debian.org/security/2018/dsa-4283
https://github.com/nov/json-jwt
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/json-jwt/CVE-2018-1000539.yml
https://github.com/nov/json-jwt/pull/62
https://github.com/nov/json-jwt/commit/a3b2147f0f6d9aca653e7a30e453d3a92b33413f
https://nvd.nist.gov/vuln/detail/CVE-2018-1000539
https://security-tracker.debian.org/tracker/CVE-2018-1000539
https://www.mend.io/vulnerability-database/CVE-2018-1000539

Severity Score

Weakness Type (CWE)

Improper Verification of Cryptographic Signature

CWE-347

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): LOW
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): NONE
Additional information:

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